A useful differential diagnosis is a prioritized set of plausible explanations for a patient's findings, rather than simply a long list of possible diseases.
3 Developing a Differential Diagnosis Online Quiz Questions
Use this free practice quiz with 20 questions to review 3 Developing a Differential Diagnosis, test your knowledge, and prepare for your next test or exam.
A concise summary of a patient's presentation that preserves the features most useful for distinguishing causes is called a .
Which description is the most discriminating problem representation for a patient with breathlessness?
- A
Shortness of breath
- B
Sudden breathlessness after recent surgery, with low oxygen saturation and no fever
- C
A patient has a breathing problem
What two-word term describes organized knowledge linking predisposing factors, disease mechanisms, expected findings, and a condition's course?
True or false: A less likely diagnosis may still need prompt exclusion when the potential harm of missing it is high.
- A
True
- B
False
A patient's breathlessness does not fit a familiar illness pattern. Which approach best broadens the initial search for explanations?
- A
Use only the diagnosis that most resembles a familiar pattern
- B
List diseases without considering how they could produce the finding
- C
Ask what mechanisms could produce the observed breathlessness
Which considerations can appropriately affect how diagnostic candidates are ranked? Select all that apply.
- A
Consider the patient's context and risk factors
- B
Treat the most likely diagnosis as necessarily the most urgent
- C
Assess how well each candidate fits the findings
- D
Consider the consequences of delaying action
Time-sensitive or high-harm possibilities that warrant consideration even when less likely are called .
What is the concise summary of a patient's presentation called when it preserves the features most useful for distinguishing among causes?
A patient develops acute breathlessness. Which finding from the presentation would increase concern for pulmonary embolism?
- A
Fever with focal lung findings
- B
Recent surgery with sudden onset
- C
Wheezing
Explain why a clinician should consider both the likelihood of a diagnosis and the consequences of missing it. Include how a less likely diagnosis could still affect the next steps.
A clinician is deciding what information to gather next for several plausible diagnoses. Which actions are most useful for distinguishing the candidates? Select all that apply.
- A
Ask what else would be expected if each leading diagnosis were true
- B
Collect additional information without a clear diagnostic purpose
- C
Choose an examination maneuver that could separate competing explanations
- D
Select a test because its possible results could distinguish candidates
New examination findings do not fit the leading diagnosis as well as expected, but fit an alternative better. What is the most appropriate way to update the differential?
- A
Keep the original ranking unless the patient develops a new symptom
- B
Compare each candidate's expected pattern with the actual findings and revise the ranking
- C
Remove every diagnosis contradicted by a single finding
When beginning a differential diagnosis, what is the main purpose of creating a concise problem representation?
- A
A list of every disease that can cause the main symptom
- B
A concise description that preserves the features most useful for distinguishing causes
- C
A summary limited to the patient's main concern and age
- D
A proposed diagnosis stated before relevant findings are gathered
A clinician recognizes a familiar pattern in a patient's breathlessness. Which next step best reduces the risk of overlooking another plausible cause?
- A
Choose the diagnosis that matches the first familiar pattern and stop considering alternatives
- B
Consider only diseases previously seen in patients with the same main symptom
- C
Ask what mechanisms could produce the observed problem, including causes that do not fit a classic pattern
- D
Delay generating explanations until a test result confirms one diagnosis
When deciding what to ask or test next, which approach is most likely to help distinguish competing explanations?
- A
Choose information that is expected to differ meaningfully across the leading explanations
- B
Collect as much information as possible, regardless of whether it separates the candidates
- C
Ask only questions that confirm the most familiar diagnosis
- D
Select a test because it is routine, even if its result would not affect the ranking
A single normal test result necessarily excludes the diagnosis being considered.
- A
True
- B
False
In a patient with acute breathlessness, which diagnosis is a particular concern when symptoms began suddenly after recent surgery? Enter the diagnosis in full or its standard abbreviation.
In a patient with acute breathlessness, what diagnosis may be supported by orthopnea together with peripheral edema? Enter the diagnosis.
A dangerous condition appears less likely than another explanation but could cause serious harm if missed. How should it be handled in the differential?
- A
Rank conditions only by how common they are in the general population
- B
Put the most dangerous possibility first in every case, regardless of fit or context
- C
Treat likelihood and consequence as interchangeable measures
- D
Consider both how well a condition fits and the consequences of delaying its recognition